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308256-12-4

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308256-12-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 308256-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,8,2,5 and 6 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 308256-12:
(8*3)+(7*0)+(6*8)+(5*2)+(4*5)+(3*6)+(2*1)+(1*2)=124
124 % 10 = 4
So 308256-12-4 is a valid CAS Registry Number.

308256-12-4Relevant articles and documents

Intramolecular [3+2]-hetero-annulation of allylsilanes with 1,3-cyclohexanediones and its application in the synthesis of hexacyclic hopane triterpenes

Schinzer,Muller,Fischer,Priess

, p. 1265 - 1268 (2007/10/03)

In this letter we describe the intramolecular [3+2]-hetero-annulation of allylsilanes with 1,3-cyclohexanediones followed by sila-Wagner-Meerwein shift. The new synthesis of the cyclization precursors offers the advantage to vary the silyl terminator at t

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